The Long Outer-Hair-Cell RC Time Constant: A Feature, Not a Bug, of the Mammalian Cochlea

A Altoè, CA Shera - Journal of the Association for Research in …, 2023 - Springer
The cochlea of the mammalian inner ear includes an active, hydromechanical amplifier
thought to arise via the piezoelectric action of the outer hair cells (OHCs). A classic problem …

The frequency response of outer hair cell voltage-dependent motility is limited by kinetics of prestin

J Santos-Sacchi, W Tan - Journal of Neuroscience, 2018 - Soc Neuroscience
The voltage-dependent protein SLC26a5 (prestin) underlies outer hair cell electromotility
(eM), which is responsible for cochlear amplification in mammals. The electrical signature of …

Megahertz sampling of prestin (SLC26a5) voltage-sensor charge movements in outer hair cell membranes reveals ultrasonic activity that may support electromotility …

J Santos-Sacchi, JP Bai… - Journal of Neuroscience, 2023 - Soc Neuroscience
Charged moieties in the outer hair cell (OHC) membrane motor protein, prestin, are driven
by transmembrane voltage to power OHC electromotility (eM) and cochlear amplification …

Outer hair cell electromotility is low-pass filtered relative to the molecular conformational changes that produce nonlinear capacitance

J Santos-Sacchi, KH Iwasa, W Tan - Journal of General Physiology, 2019 - rupress.org
The outer hair cell (OHC) of the organ of Corti underlies a process that enhances hearing,
termed cochlear amplification. The cell possesses a unique voltage-sensing protein, prestin …

Prestin kinetics and corresponding frequency dependence augment during early development of the outer hair cell within the mouse organ of Corti

JP Bai, D Navaratnam, J Santos-Sacchi - Scientific Reports, 2019 - nature.com
Several studies have documented the early development of OHC electromechanical
behavior. The mechanical response (electromotility, eM) and its electrical correlate …

Complex nonlinear capacitance in outer hair cell macro-patches: effects of membrane tension

J Santos-Sacchi, W Tan - Scientific Reports, 2020 - nature.com
Outer hair cell (OHC) nonlinear capacitance (NLC) represents voltage sensor charge
movements of prestin (SLC26a5), the protein responsible for OHC electromotility. Previous …

State dependent effects on the frequency response of prestin's real and imaginary components of nonlinear capacitance

J Santos-Sacchi, D Navaratnam, WJT Tan - Scientific Reports, 2021 - nature.com
The outer hair cell (OHC) membrane harbors a voltage-dependent protein, prestin
(SLC26a5), in high density, whose charge movement is evidenced as a nonlinear …

On the frequency response of prestin charge movement in membrane patches

J Santos-Sacchi, W Tan - Biophysical Journal, 2022 - cell.com
Outer hair cell (OHC) nonlinear membrane capacitance derives from voltage-dependent
sensor charge movements within the membrane protein prestin (SLC26a5) that drive OHC …

Chloride anions regulate kinetics but not voltage-sensor Qmax of the solute carrier SLC26a5

J Santos-Sacchi, L Song - Biophysical journal, 2016 - cell.com
In general, SLC26 solute carriers serve to transport a variety of anions across biological
membranes. However, prestin (SLC26a5) has evolved, now serving as a motor protein in …

Cellular differences in the cochlea of CBA and B6 mice may underlie their difference in susceptibility to hearing loss

H Liu, G Li, J Lu, YG Gao, L Song, GL Li… - Frontiers in Cellular …, 2019 - frontiersin.org
Hearing is an extremely delicate sense that is particularly vulnerable to insults from
environment, including drugs and noise. Unsurprisingly, mice of different genetic …